CH188790A - Process for the production of an indigoid dye. - Google Patents
Process for the production of an indigoid dye.Info
- Publication number
- CH188790A CH188790A CH188790DA CH188790A CH 188790 A CH188790 A CH 188790A CH 188790D A CH188790D A CH 188790DA CH 188790 A CH188790 A CH 188790A
- Authority
- CH
- Switzerland
- Prior art keywords
- indigoid dye
- production
- naphtoxythiophene
- dye
- anil
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B7/00—Indigoid dyes
- C09B7/10—Bis-thionapthene indigos
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
Zusatzpatent zum Hauptpatent Nr. 185958. Verfahren zur Herstellung eines indigolden Farbstoffes. Es wurde gefunden, dass man einen indi- goiden Farbstoff herstellen kann, wenn man 8-Brom-1 .2-naphtoxythiophen mit derb p Diinethylamino-2-anil des 2 . 1-Naphtoxythio- phens kondensiert.
Der erhaltene indigoide Farbstoff der Formel
EMI0001.0012
stellt ein dunkelbraunes Pulver dar, das sich in Schwefelsäure mit violettblauer Farbe löst und aus grünlichgelb gefärbter Küpe Baumwolle sowie Kunstseide aus regenerierter Zellulose in kräftigen schwärzlichbraunen Farbtönen von ausgezeichneter Chlor-, Wasch- und Lichtechtheit färbt.
Die selben Farbtöne werden beim Bedrucken von zellulosehaltiger Faser erhalten, Die Kondensation wird zweckmässig durch Erwärmen der Komponenten in einem Lö- sungs- bezw. Verdünnungsmittel, wie zum Beispiel in Alkohol, Eisessig, Benzol oder Chlorbenzol, durchgeführt.
Der besondere Wert des Farbstoffes liegt darin, dass die unter seiner Verwendung er zeugten Färbungen und Drucke neben den vorzüglichen Echtheiten einen schwärzlich braunen, das heisst einen solchen Farbton aufweisen, wie er bis anhin nur mit Mischun gen von Küpenfarbstoffen, die die bekann ten Nachteile aufweisen, erhalten werden konnte.
<I>Beispiel:</I> 279 Teile 8-Brom-l. 2-naphtoxythiophen und 332 Teile p-Dimethylamino-2-anil des 2. 1-Naphtoxythiophens werden in 4000 Tei len Chlorbenzol mehrere Stunden zum Sieden erhitzt. Hierauf wird der in guter Ausbeute abgeschiedene Farbstoff filtriert, gewaschen und getrocknet,
Additional patent to main patent no. 185958. Process for the production of an indigolden dye. It has been found that an indigoid dye can be produced if 8-bromo-1 .2-naphthoxythiophene is mixed with derb p diinethylamino-2-anil des 2. 1-naphtoxythiophene condensed.
The indigoid dye of the formula obtained
EMI0001.0012
is a dark brown powder that dissolves in sulfuric acid with a violet-blue color and dyes cotton and rayon made from regenerated cellulose from a greenish-yellow vat in strong blackish-brown shades of excellent resistance to chlorine, washing and light.
The same shades of color are obtained when printing cellulose-containing fibers. The condensation is expediently achieved by heating the components in a solution or solution. Diluents, such as alcohol, glacial acetic acid, benzene or chlorobenzene, performed.
The special value of the dye lies in the fact that the dyeings and prints produced using it, in addition to the excellent fastness properties, have a blackish brown, i.e. a shade of color that has hitherto only been possible with mixtures of vat dyes, which have the known disadvantages , could be obtained.
<I> Example: </I> 279 parts of 8-bromine-l. 2-naphtoxythiophene and 332 parts of p-dimethylamino-2-anil of the 2nd 1-naphtoxythiophene are heated in 4000 parts of chlorobenzene for several hours. Then the dyestuff deposited in good yield is filtered, washed and dried,
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH188790T | 1935-07-10 | ||
CH185958T | 1935-07-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH188790A true CH188790A (en) | 1937-01-15 |
Family
ID=25721326
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH188790D CH188790A (en) | 1935-07-10 | 1935-07-10 | Process for the production of an indigoid dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH188790A (en) |
-
1935
- 1935-07-10 CH CH188790D patent/CH188790A/en unknown
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